Improvement in the manufacture of fertilizers



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WILLIAM I. SAPl or BALTIMORE, MARYLAND, ASSIGNOR TO B. M. RHODES & 00., 0F SAME PLACE. I

Letters Patent No. l02,438, dated April 26, 1870.

IMPROVEMENT IN THE MANUFACTURE OF PER'I'ILIZERS.

The Schedule referred to in these Letters Patent and making part of the same To all whom 'it may concern.-

Be it known that I, WILLIAM I. SAPP, of the city and county of Baltimore and State of Maryland, have invented a new and useful Improvement in the Manfacture of Fertilizers, of which the following is a full, clear, and exact description.

The nature of my invention consists in the employmentof sili'cic acid or water glass, for the purpose of' dissolving or rendering soluble the phosphates inphosphatic guano, orin the treatment of raw bones, when preparing them for combination with other ingredients which enter into the composition of many of the wellknown fertilizers. v

In my process of manufiictu're, I proceed substantially as follows: I I

I prepare the guano by pulverizing or grinding, when necessary, as is the custom when it is to be treated witbsulphuric acid, and then proceed to apply to one ton of SwanYs Island guano, containing about thirty-five per cent. of phosphates, eleven hundred pounds of water glass, containing about thirty-five per cent. of silicic acid. This renders nearly or quite all the phosphates in. the mass soluble in water, and

fits the compound for the further admixture of other ingredients, which are usually employed in the formation of artificial manures, or, if prclerred, the mass .What I claiiu'as new, and desire to secnrehy Letters Patent, is'

The employment of soluble silicic acid or water glass,

-for rendering soluble the phosphates in phosphatiq guano.

Also, the new fertilizer, made from silicated phosphates, produced by the process herein described.

WM. '1. SAPP. Witnesses; I

II; H. DOUBLEDAY, G. M. WILLIAMS. 

